I'm definitely upgrading. People are downplaying the difference in specs but, with almost twice the processor speed, ram, official gingerbread (not a mish-mash of gingerbread features with a froyo base), bigger screen, hdmi out, dlna support, LTE, real flash support. When this bad boy gets rooted, rom'd, and oc'd it will be a f*ckn BEAST! Don't get me wrong I've enjoyed my Optimus and it was my first smartphone but, I've had it almost a year now and I think we've pushed it as far as it will go. It has served me well but, this is definitely an upgrade worth making, at least for me. I'm just waiting for the MIR to go into effect.
Just my $.02.
An artist never really finishes his work, he merely abandons it.